The Preparation Of Functionalized Conductive Micro-nano Composite Materials And Their Application In Flexible Electronic Devices

Because the characteristics of hard and brittle,traditional electronic devices will lose founctions once they are deformed.Thus,developing new portable,foldable and wearable decices have attracted more attentions in nowadays.Herein,besides carbon series materials,conducting polymer is often used as conductive element.As an easy and efficient method to prepare flexible fibrous material,electrospinning becomes one of the most widely used preparation method.In order to meet the development needs of flexible electronic devices,the goal of this work is to fabricate simple,effective and low-cost flexible conductive composite and expore their applications.The research contents are as follows:?1?Electrospinning is a convenient and low-cost method to prepare flexible materials.We fabricated PANI/TPU nanofibrous membrane by electrospinning and in situ polymerization for flexible strain sensor.The sensor could detect a tensile strain from 0%to 160%with favourable response and reliable stability,and could be applied to detect joint motion.This work provided an easy and low-cost method to fabricate highly stretchable composite nanofibrous membrane,which have potential applications in wearable devices.?2?Despite the feasibility and simplicity,solution electrospinning has potential harmfulness in human health,environment and precursor utilization because of the solvent evaporation in preparation.To avoid solvent evaporation,we fabricated electromagnetic functionalized PANI/PUA/Fe₃O₄ fibers by UV-assisted solvent-free electrospinning.The fibers exhibited superparamagnetic behavior at 300 K,could be stretched to 199.9%and showed good response to tension,pressure and finger motion.This work provided an efficient and eco-friendly approach to fabricate multi-functional composites.?3?To design flexible sensors with elaborate structures is usually complicated and expensive.Due to the characteristic of 3D structure,good elasticity and low-cost manufacturing,the ubiquitous sponge has aroused extensive concerns.Based on commercial sponge,in situ polymerization was applied to prepare PANI/sponge composite for piezoresistive sensor and adjustable sensitivity gas sensor.This work provided an effective and low-cost approach to fabricate 3D porous conductive composite and device.